发动机起动动态过程富氧燃烧排放及其失火特性探究.pdfVIP

第 3 1 卷 第 3 期 内　燃 　机 　工 　程 Vol . 3 1 No . 3 　 20 10 年 6 月 Chinese Int ernal Combu stion Engine Engineering J une . 20 10 　 文章编号 :1000 - 0925 (20 10) 03 - 0007 - 04 3 10046 发动机起动动态过程富氧燃烧排放及其失火特性研究 高 　青 ,刘成材 ,金英爱 ,马纯强 ,张广军 ,苏俊林 ( 吉林大学 热能工程系 ,长春 130025) Investigation on Start Emission and Misf ire Characteristics of Spark Ignition Engine Intaking OxygenEnriched Air GAO Qing , L IU Chengcai , J IN Yingai , MA Chunqiang , ZHANG Guangj un , SU Junl in ( Ther mal Ener gy En gineerin g Dep art ment ,J ilin U niver sit y ,Changchun 130025 ,China) Abstract : The dynamic co mbu stion and emi ssion charact eri stic s of a SI en gine f ed wit h int ake air of va riou s o xygen cont ent (2 1 %～27 %) in st art p erio d were inve stigat ed . Re sult s show t hat wit h t he increa se of o xygen cont ent in t he int ake air , CO , H C emi ssion s decrea se o bviou sly , but N Ox emi ssion ri se s slight ly . The eff ect to reduce t he CO , H C emi ssion s i s co mp aratively be st for t he lower p ortion of t he ran ge (o xygen cont ent 23 %～25 %) , if exceedin g 25 % it get s evident ly dimini shed . Alt hough t he o xygenenriched int ake air cau se s a cert ain increa se of t he N Ox emi ssion , it i s still at accep t able low level , due to t he en gine i s j u st st artin g . It i s know n by op tical sen sor det ection in cylinder t hat t he app rop riat e o xygenenriched at mo sp here i s advant ageou s to t he flame sp read and diff u sio n , making t he en gine co mbu stion st able in st art p erio d , con sequent ly t he mi sfire rat e drop s sharp ly . 摘要 : 针对发动机选择性组分